Move InvalidationGuard/InstanceUpdateBlocker out of SVGElementInstance

Source/core/svg/SVGCursorElement.cpp

Index: Source/core/svg/SVGCursorElement.cpp
diff --git a/Source/core/svg/SVGCursorElement.cpp b/Source/core/svg/SVGCursorElement.cpp
index 8022ccd7f176f235ad12f1b4672ad74ea4199ed1..0f8e48cd656a8fd3a3c83c8c35a728f50051d550 100644
--- a/Source/core/svg/SVGCursorElement.cpp
+++ b/Source/core/svg/SVGCursorElement.cpp
@@ -117,7 +117,7 @@ void SVGCursorElement::svgAttributeChanged(const QualifiedName& attrName)
         return;
     }
 
-    SVGElementInstance::InvalidationGuard invalidationGuard(this);
+    SVGElement::InvalidationGuard invalidationGuard(this);
 
     // Any change of a cursor specific attribute triggers this recalc.
     WillBeHeapHashSet<RawPtrWillBeWeakMember<SVGElement> >::const_iterator it = m_clients.begin();